Abstract: An adjusting method and a structure for a seat post of a bicycle are provided. The structure of the seat post includes an adjusting tube, four pulleys, a pushing member, a main tube, an elastic member, and a cord. The adjusting tube is coaxially movably disposed in the main tube, while the pushing member is coaxially movably disposed in the adjusting tube and coaxially fixed with the main tube. One of the pulleys is pivotally disposed in the adjusting tube, and the other pulleys are pivotally disposed in the pushing member. Two of the pulleys inside the pushing member are movable along the pushing member. The cord is wound around the four pulleys. The elastic member is disposed in the pushing member and can push the pulleys to move. Pulleys moving along the pushing member push the adjusting tube moving outwardly form the main tube.

Abstract: An adjusting method and a structure for a seat post of a bicycle are provided. The structure of the seat post includes an adjusting tube, four pulleys, a pushing member, a main tube, an elastic member, and a cord. The adjusting tube is coaxially movably disposed in the main tube, while the pushing member is coaxially movably disposed in the adjusting tube and coaxially fixed with the main tube. One of the pulleys is pivotally disposed in the adjusting tube, and the other pulleys are pivotally disposed in the pushing member. Two of the pulleys inside the pushing member are movable along the pushing member. The cord is wound around the four pulleys. The elastic member is disposed in the pushing member and can push the pulleys to move. Pulleys moving along the pushing member push the adjusting tube moving outwardly form the main tube.

Abstract: A composite shock-absorbing material comprised of kernel material, winding material, and a resin layer, and where the kernel material is spiraled by the winding material. A resin layer covers both the surfaces of both the kernel material and the winding material. Hence, the composite shock-absorbing material of the present invention is formed. A method of forming the composite shock-absorbing material includes providing kernel material and forming a winding material spiraling the kernel material and then forming a resin layer on the surfaces of the kernel material and the winding material.

Abstract: A composite shock-absorbing material comprised of kernel material, winding material, and a resin layer, and where the kernel material is spiraled by the winding material. A resin layer covers both the surfaces of both the kernel material and the winding material. Hence, the composite shock-absorbing material of the present invention is formed. A method of forming the composite shock-absorbing material includes providing kernel material and forming a winding material spiraling the kernel material and then forming a resin layer on the surfaces of the kernel material and the winding material.